Original sentence: According to :.Direct Instruction  is an instructional method proposed by Siegfried Engelmann.Don Potter's Education Page, with free downloadable books and mp3 files.National Institute for Direct Instruction.Project Follow Through (was) completed in the 1970s.The Phonics Page, with free quicktime movies
Edited sentence: According to  "Project Follow Through (was) completed in the 1970s.Direct Instruction  is an instructional method proposed Siegfried Engelmann.You can find free downloadable books and mp3 files at Don Potter's Education Page and free quicktime movies at The Phonics Page