Week four the letter is Dd, the color yellow, shape diamond and the number is 4. Click image above for letter of the week Dd learning ideas. Click on the image above for a yellow color poster and matching activity. Click on the link above for a diamond tracing worksheet and a coloring page. (I am a participant in the Amazon Associates Program and any qualifying purchases made through affiliate links I may earn commission on at no additional cost to you.)Items shown above are my Amazon picks. Click image above for more week to week learning ideas. Click image above for more ways to teach the alphabet. Click image above for more ideas to teach shapes. Click image above for more ideas to learn colors. Click image above to go back to HOME page.