diff --git a/single-page b/single-page
index 72e14a957..6847dce6f 100644
--- a/single-page
+++ b/single-page
@@ -6265,7 +6265,7 @@ features:
 * ⭐ **[Internet Chemistry](https://www.internetchemistry.com/search.php)** - Search Index
 * [BiologyOnline](https://www.biologyonline.com/) - Biology Articles
 * [Chemistry Basics](https://saylordotorg.github.io/text_the-basics-of-general-organic-and-biological-chemistry/index.html) - Basics of General, Organic, and Biological Chemistry
-* [Tyler DeWitt](https://www.youtube.com/user/tdewitt451), [TheOrganicChemistryTutor](https://www.youtube.com/c/TheOrganicChemistryTutor), [Allery Chemistry](https://www.youtube.com/channel/UCPtWS4fCi25YHw5SPGdPz0g), [Khan Academy AP Chemistry](https://www.khanacademy.org/science/ap-chemistry-beta), [Organic Chemistry etext](https://www.chem.ucalgary.ca/courses/351/Carey5th/Carey.html), [ChemistryScore](https://chemistryscore.com/), [PeriodicVideos](https://www.youtube.com/@periodicvideos) 
+* [Tyler DeWitt](https://www.youtube.com/user/tdewitt451), [TheOrganicChemistryTutor](https://www.youtube.com/c/TheOrganicChemistryTutor), [Allery Chemistry](https://www.youtube.com/channel/UCPtWS4fCi25YHw5SPGdPz0g), [Khan Academy AP Chemistry](https://www.khanacademy.org/science/ap-chemistry-beta), [Organic Chemistry etext](https://www.chem.ucalgary.ca/courses/351/Carey5th/Carey.html), [ChemistryScore](https://chemistryscore.com/), [PeriodicVideos](https://www.youtube.com/@periodicvideos) - Chemistry Lessons
 * [ChemicalAid](https://www.chemicalaid.com/) - Chemistry Calculators / Element Tables
 * [PubChem](https://pubchem.ncbi.nlm.nih.gov/), [MOTM](https://www.chm.bris.ac.uk/motm/motm.htm), [NIST](https://webbook.nist.gov/chemistry/) or [EssentialChemicalIndustry](https://www.essentialchemicalindustry.org/) - Chemistry Wikis
 * [ChemistrySteps](https://www.chemistrysteps.com/) or [DocBrown](https://docbrown.info/) - Chemistry Practice / Guides