Hello Tony. Look at the GeoInquiry collections located at ESRI.com/geoinquiries. They are all free, use ArcGIS Online and require no login if you don't have an Org account. If you have more questions, feel free to post more on this thread. I love talking about GeoInquiries!
Tony - I have a bunch of these lessons written. here is one of them - grade 6 math. Feel free to email me at email@example.com for more.