diff --git a/src/fallback_extraction.js b/src/extraction/fallback_extraction.js
similarity index 97%
rename from src/fallback_extraction.js
rename to src/extraction/fallback_extraction.js
index db1f6ee..5b3535f 100644
--- a/src/fallback_extraction.js
+++ b/src/extraction/fallback_extraction.js
@@ -2,7 +2,7 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-/*
+/**
 * Uses CSS selectors, or failing that, Open Graph <meta> tags to extract
 * a product from its product page, where a 'product' is defined by the bundle
 * of features that makes it identifiable.
@@ -10,7 +10,7 @@
 * Features: title, image, price
 */
 
-import extractionData from 'commerce/product_extraction_data.json';
+import extractionData from 'commerce/extraction/product_extraction_data.json';
 
 const OPEN_GRAPH_PROPERTY_VALUES = {
   title: 'og:title',
diff --git a/src/fathom_default_coefficients.json b/src/extraction/fathom_default_coefficients.json
similarity index 100%
rename from src/fathom_default_coefficients.json
rename to src/extraction/fathom_default_coefficients.json
diff --git a/src/fathom_extraction.js b/src/extraction/fathom_extraction.js
similarity index 93%
rename from src/fathom_extraction.js
rename to src/extraction/fathom_extraction.js
index 263c366..0b59e84 100644
--- a/src/fathom_extraction.js
+++ b/src/extraction/fathom_extraction.js
@@ -2,7 +2,7 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-/*
+/**
  * Uses Fathom to extract a product from its product page,
  * where a 'product' is defined by the bundle of features that
  * makes it identifiable.
@@ -10,8 +10,8 @@
  * Features: title, image, price
  */
 
-import defaultCoefficients from 'commerce/fathom_default_coefficients.json';
-import RulesetFactory from 'commerce/ruleset_factory';
+import defaultCoefficients from 'commerce/extraction/fathom_default_coefficients.json';
+import RulesetFactory from 'commerce/extraction/ruleset_factory';
 import {SCORE_THRESHOLD} from 'commerce/config';
 
 const PRODUCT_FEATURES = ['title', 'price', 'image'];
diff --git a/src/product_extraction_data.json b/src/extraction/product_extraction_data.json
similarity index 100%
rename from src/product_extraction_data.json
rename to src/extraction/product_extraction_data.json
diff --git a/src/ruleset_factory.js b/src/extraction/ruleset_factory.js
similarity index 97%
rename from src/ruleset_factory.js
rename to src/extraction/ruleset_factory.js
index 2053ec0..7e4744f 100644
--- a/src/ruleset_factory.js
+++ b/src/extraction/ruleset_factory.js
@@ -2,13 +2,19 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
+/**
+ * Exports a RulesetFactory class, which when instantiated, binds Fathom
+ * coefficients to a ruleset. An instance of this class is used for product
+ * feature extraction (`fathom_extraction.js`) and for training (`trainees.js`).
+ */
+
 import {dom, out, rule, ruleset, score, type} from 'fathom-web';
 // Since the fathom-trainees add-on currently uses a submodule of Fathom, for
 // training, replace 'utils' with 'utilsForFrontend'
 import {ancestors} from 'fathom-web/utils';
 // relative URLs are needed for training, as the 'commerce' alias doesn't exist
 // in that context
-import {SCORE_THRESHOLD} from './config';
+import {SCORE_THRESHOLD} from '../config';
 
 const DEFAULT_BODY_FONT_SIZE = 14;
 const DEFAULT_SCORE = 1;
diff --git a/src/product_info.js b/src/product_info.js
index e5de47c..9aa01a2 100644
--- a/src/product_info.js
+++ b/src/product_info.js
@@ -7,8 +7,8 @@
  * "document_idle", which is after all DOM content has been loaded.
  */
 
-import extractProductWithFathom from 'commerce/fathom_extraction';
-import extractProductWithFallback from 'commerce/fallback_extraction';
+import extractProductWithFathom from 'commerce/extraction/fathom_extraction';
+import extractProductWithFallback from 'commerce/extraction/fallback_extraction';
 
 /**
  * Checks to see if any product information for the page was found,
diff --git a/src/trainees.js b/src/trainees.js
index 6863517..a8ce8fb 100644
--- a/src/trainees.js
+++ b/src/trainees.js
@@ -2,8 +2,8 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-import defaultCoefficients from './fathom_default_coefficients.json';
-import RulesetFactory from './ruleset_factory';
+import defaultCoefficients from './extraction/fathom_default_coefficients.json';
+import RulesetFactory from './extraction/ruleset_factory';
 
 // Array of numbers corresponding to the coefficients
 const coeffs = Object.values(defaultCoefficients);
@@ -20,9 +20,12 @@ const coeffs = Object.values(defaultCoefficients);
  *
  * How to train:
  *  1. Fork the `mozilla/fathom-trainees` repo,
- *  2. Copy this file, `fathom_default_coefficients.json`, `ruleset_factory.js`
- *   and `config.js` over to the `./src` folder in the `fathom-trainees` add-on.
- *  3. Follow instructions at: https://github.com/erikrose/fathom-fox#the-trainer
+ *  2. In the `fathom-trainees` add-on, copy this file and `config.js` over to the
+ *  `./src` folder, and copy `./extraction/fathom_default_coefficients.json` and
+ *  `./extraction/ruleset_factory.js` to a new `./src/extraction` subfolder.
+ *    * Note: You will have to replace 'utils' with 'utilsForFrontend' on the
+ *      import in `ruleset_factory.js`. See that file for more information.
+ *  3. Follow instructions at: https://github.com/erikrose/fathom-fox#the-trainer.
  *
  * Notes:
  * - The FathomFox Trainer assumes that the value of your corpus' `data-fathom`