I created Google Sheet/Excel to explain several ML algorithms from scratch. You will receive a Google folder that contains all the Google Sheets. Here are the Medium articles - towardsdatascience.com/k-means-from-scratch-in-excel-bb60778d186e - towardsdatascience.com/k-nearest-neighbors-in-excel-76edd4102a5b - towardsdatascience.com/logistic-regression-with-gradient-descent-in-excel-52a46c46f704 - towardsdatascience.com/neural-network-from-scratch-in-excel-4774f6131cdb - towardsdatascience.com/linear-regression-from-scratch-in-excel-3d8192214752 - and more. More articles will come. Thank you for your support.