The publisher of our Algebra Connections textbook, CPM (College Preparatory Mathematics), has a terrific homework help resource on the web. For each homework problem, it has tips, sample work, suggestions, and/or a few answers to check against as you work.
There are lots of other things for families on cpm.org in addition to the homework help, including extra practice worksheets, technology resources, resource pages to go with lessons (the same ones provided in class), and advice and guides for parents. Hope you find lots of useful things! If you have particular recommendations, please leave them in the comments.