documentclass[letter,openleft,twoside]{memoir}
usepackage[left=0pt,right=0pt,top=2cm,bottom=2cm]{geometry}
usepackage{forloop}
usepackage{adjustbox}
usepackage{fancyhdr}
usepackage[absolute]{textpos}


setlength{TPHorizModule}{1cm}
setlength{TPVertModule}{1cm}


fancypagestyle{mypagestyle}{%
  fancyhf{}% Clear header/footer
  fancyhead[OC]{}% Author on Odd page, Centred
  fancyhead[EC]{Week of makebox[2in]{dotfill} to makebox[2in]{dotfill}}% Title on Even page, Centred
  fancyfoot[C]{thepage}%
  renewcommand{headrulewidth}{0pt}% Header rule of .4pt
}
pagestyle{mypagestyle}

newcommand{aline}{\hline &&&&&&rule{0cm}{5cm}}
newcounter{theyflines}
%pagestyle{empty}
parindent=0pt

newcommand{apage}{

begin{textblock}{21.59}(0,3)
adjustbox{clip=true,trim=0pt 0pt {textwidth} 0pt}{useboxtempbox}
end{textblock}
pagebreakvspace*{fill}%
begin{textblock}{21.59}(0,3)
adjustbox{clip=true,trim={textwidth} 0pt 0pt 0pt}{useboxtempbox}
end{textblock}
}


newcounter{theyfpages}

newsavebox{tempbox}
newlength{pwidth}
newlength{spwidth}

setlength{pwidth}{dimexpr textwidth-6tabcolsep-4arrayrulewidth}%
dividepwidth by 3
setlength{spwidth}{dimexpr pwidth-2cm-2tabcolsep-arrayrulewidth}%

savebox{tempbox}{% fit 3 columns into textwidth
begin{tabular}{p{2cm}|p{spwidth}|p{pwidth}|p{pwidth}|p{pwidth}|p{pwidth}|p{pwidth}|}
hline
Course & Weekly goal & Monday & Tuesday & Wednesday & Thursday & Friday
forloop{theyflines}{1}{value{theyflines} < 5}{aline}\
hline
&&&&&&rule{0cm}{2cm}\
hline
end{tabular}}

begin{document}

nullnewpage

forloop{theyfpages}{1}{value{theyfpages} < 41}{apage}

end{document}