While I have not heard the 100% claim (nor would I ever believe it without lots of additional qualifiers), I have also heard lots of good things about Slingshot. This has been from people who are in the business and said they referred clients to them who are looking to capture some highly contested keywords. So take that as 2 votes of confidence for Slingshot. :)
A colleague and I attended a week-long training session at the Tampa SEO Training Academy. We learned tons and have been able to do the SEO on our new site. I would recommend looking into that - www.Tampa-SEO.com. SEO is an ongoing process, so knowing the basics and more would be beneficial to you.
"Join our next webcast with Maxwell Rowe from @mackeycreativelab as he discusses ways to help students reach their educational goals using the guided pathways model on your website. http://bit.ly/2zhdcIt"
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"If you’re struggling with web challenges such as accessibility, SEO, design consistency, workflow, content governance, or how to start a website redesign, you’re not alone. Join our next webcast to learn how other higher ed institutions…"